1 files changed, 2 insertions, 2 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/KeyPairGeneratorSpi.java b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/KeyPairGeneratorSpi.java
index c6ddf9b..d2c2c71 100644
--- a/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/KeyPairGeneratorSpi.java
+++ b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/KeyPairGeneratorSpi.java
@@ -34,9 +34,9 @@ public class KeyPairGeneratorSpi
         int strength,
         SecureRandom random)
     {
-        if (strength < 512 || strength > 1024 || strength % 64 != 0)
+        if (strength < 512 || strength > 4096 || ((strength < 1024) && strength % 64 != 0) || (strength >= 1024 && strength % 1024 != 0))
         {
-            throw new InvalidParameterException("strength must be from 512 - 1024 and a multiple of 64");
+            throw new InvalidParameterException("strength must be from 512 - 4096 and a multiple of 1024 above 1024");
         }
 
         this.strength = strength;